From best boys 21st birthday party ideas and best 21st birthday ideas for guys at home to what to do on your 21st birthday for guys and best 21st birthday party ideas for your son, brother or boyfriend! Here is how to throw a cool and unforgettable 21st birthday party for guys on a budget, to make it a night to remember! Posts on www.ratherrudecards.co.uk contain affiliate links. For full disclosure, click HERE PS Prank them with a realistic chocolate breakfast! 👈🏻 Or tell him he's getting old with this epic realistic chocolate pipe! 👈🏻 Also, if your recipient is a gym goer, these chocolate weights are perfect! 👈🏻 1. Theme it after their favourite sport You could even make batches of different coloured popcorn to represent the colours of their favourite teams! 2. A jumbo '21' birthday cake topper 👈🏻 Personalised sports '21' birthday cake topper 👈🏻 3. Everyone dresses up as your recipient This is a hilarious party dress code! You could even provide masks of your recipient's face to each guest to wear! 4. Gift him a realistic chocolate toilet roll 👈🏻 This will look epic on top of your recipient's cake too! 5. Try out a smoke paint grenade 👈🏻 For amazing effect! This will also make the perfect backdrop to photos of your recipient on their special day. These never fail to look insane! 6. Throw a beer themed birthday party Or replace with their favourite tipple! 7. Host a sneakers themed birthday party There are so many fun ideas to try here that also feature in our DIY Teenage Boy Birthday Party ideas post, from baking some amazing sneaker sugar cookies (after their favourite sneaker variety of course!) to a jumbo sneaker birthday cake topper, to shoe care kits as party favours! Adidas Yeezy Sneaker cookie cutter 👈🏻 Nike Air Force 1 cookie cutter 👈🏻 Nike Air Jordan 1 cookie cutter 👈🏻 Converse Sneaker cookie cutter 👈🏻 8. Display a cardboard cutout of their celebrity crush This will always make them chuckle and would be the best birthday surprise for them to come down to in the morning! This would also be hilarious for birthday photos! 9. Some novelty ice cubes for drinks! There are so many different types to choose from to suit your recipient's tastes, from Nike logo ice cubes to stars to skulls and everything in between! Nike inspired ice cubes for drinks 👈🏻 10. Theme it after your recipient themselves Why not make some personalised sugar cookies of your recipient's face and even make party decorations out of funny photos of them! Make sugar cookies of your recipient's face 👈🏻 Party table confetti of your recipient's face 👈🏻 11. Personalised temporary tattoos for guests 👈🏻 These would make hilarious party favours or you could give them out to guests as they arrive. 12. Make some meme sugar cookies Why not make some hilarious meme themed birthday party sugar cookies to delight your guests with all things internet humour! Meme monkey sugar cookie cutter 👈🏻 Meme faces sugar cookie cutters 👈🏻 Meme Doge sugar cookie cutter 👈🏻 Meme party bunting 👈🏻 13. Play some drinking games 14. A food tasting challenge game You could also infuse this with alcohol and make your own custom cocktails or it can easily be an alcohol free occasion! To play this, 15. A '21' party table centerpiece These look amazing! Silver '21' party table centerpiece Personalised '21' party table centerpiece 16. Have an outdoors food fight This 'out there' epic birthday activity idea commands an outdoor space but is so much fun! Just be sure to use food that is out of date and unwanted, safe if accidentally consumed and that none of your guests have allergies to any of the items. 17. Set up a campfire evening or campout Always a goodie, this is a really fun low cost birthday party activity idea for teenage boys and guys of all ages! You could even set up a barbeque nearby with all their favourite snacks and edibles! 18. Try metallic 21 birthday balloons 👈🏻 For a majestic birthday display! 19. Create an obstacle course For your guests to complete! You could even compete in teams – such a fun no cost or low cost graduation party activity idea! 20. Throw a blacklight party To make everything spectacularly glow in the dark! You can rent safe UV blacklights for this and follow these tips for the best blacklight party ever! 21. Create a hashtag for the event So guests can tag their photos to make them appear in one place for everyone to see! 22. Make a boozy cupcake pullapart This makes for the best centrepiece for your party table! Simply arrange the cupcakes in a certain formation - you could arrange them spelling '21' - but ice them all together to make two distinct numbers, like joining the dots to complete the shape. You could make some Bailey's infused icing or frosting for the cupcakes to spread over them! 23. A list of tiktok challenges to complete A hilarious activity idea your guests will appreciate and love! 24. Make huge paper screens your guests can decorate And write messages on! You could supply a whole host of spray paint cans and pens for your guests to use; they can go all out creating cool designs. This activity is best based outdoors, in a well ventilated space and try opting for black paper or card so the colours show up extra bright! 25. Set up a gaming corner And throw a gaming tournament! 26. Try a James Bond theme 27. Throw a boozy baking competition Or contest! This would be such a hilarious birthday party activity for guys and girls; just divide in to teams and have a go making the best boozy dessert to be judged by the recipient! 28. Set up a game of basketball beer pong 29. 21st birthday fondant presser 👈🏻 Perfect for decorating your cupcakes and treats! 30. Get out the silly string Just make sure any guests can opt out if they want to! You are never too old for silly string hide and seek. Never. If you liked this definitely also check out these Best She Hulk Birthday Party ideas!