Homemade counterweights

Yo-Yo Mods and Maintenance
1

So i got into 5a about 3 days ago when i managed to make an counterweight out of a lego wheel.it is actually pretty nice,it works ok. Do you have an ideas of possible counterweights that i can make from household items? Thanks

2

Half of a pink eraser.

3

A wasp net counterweight. It made of old Yoyo string.

4

Thanks

5

Drill a hole in some bouncyballs