[phkahler]

Just keep enough of them in a small enclosure. Be prepared to increase enclosure size rapidly for a few days or weeks.

[baroomba]

Looks like grasshoppers generally live 50ish days as an adult. That's gonna put some serious limits on your max per-grasshopper-leg-rubber total accumulated grasshoppers.

[imtringued]

The grasshoppers rub each other.