Put all the clothes you intend on wearing tomorrow down your pants.

Preferably overnight.

Fill your pants with crayons for 5 hours.

Make mine VERY noticeable, please!

fill ur underwear with ice (hope thats not to messy)
if that counts as messy then fill it with an apple.

no clothing inside... be more creative

Fill your undies with grass, leaves, and sticks. Make sure to get as much as you possibly can. Leave it all in for 8 hours.

No food or ice, please! Make it as noticeable as possible for as long as possible.

Put all ur clothes u can fit in ur underwear
For Mr make mine unnoticeable

Put an egg in your pants.

Put a potatoe down your pants.

Put 3 ice cubes in your pants still they melt

Put a vibrating massager down your pants with it it on for 2 hours

Make mine painful but not messy please

Place thumbtacks down yours! Make mine good! It will be for two hours! No messy food has to be solid if it's food please

Put a sausage in between your buttcheeks and two hotdog buns around your dick. If you don't have those, use an unpeeled banana and two bread slices. Go for the first one if you can choose between both xD.
Make mine unnoticeable, unmessy(solid) but fun to have down there for a max time of 5 hours. I can use food but I prefer not to.

Put your toothbrush down your underwear for three hours then brush your teeth. Front or back its your choice

Place a handful of marbles down your underwear and go out in public. Hope you don't drop any! How ever many you drop will be the amount of edges you need to do. Mine will be for an hour (I'll do it as soon as I complete my current two hour one

Put your mobile phone between your buttchecks keep there all day until someone rings or texts you.

Can I have one while I sleep please?

Sleep without a pillow. Instead, stuff it down your pants.

Please really fill my pants up. I don't want it to just be noticeable. I want so much stuff in my pants that it's hard to even button them.