Put the bubble gums in the correct machine. There are 4 bubble gums for each one. Or print out two copies for more.
If your kids need a challenge, have them put bubble gums in the machine that equal the given number.
I'm also taking part in TpT's sale. I'm offering 20% off my whole store. Use the promo for another 10% off. Click on the button below to head on over to my store.