A water balloon fight is a great way to cool off, but filling water balloons takes so long! Well, a clever dad in Texas solved that problem with Bunch o Balloons, a plastic doodad with 37 little hoses hanging off it, each with a ready and waiting balloon at the end. You screw the piece onto the end of a garden hose and whoosh, in 20 seconds you have 37 full water balloons. When you pull them off, they close without needing a knot, and you’re ready to fire back at your friends.

*Wee ones:* Plug a sink, turn on the water, count to 10 and then turn it off. Is the sink more or less than halfway full?

*Little kids:* If you’re counting off the 20 seconds to fill your 37 water balloons, what numbers do you say? See how high you can go! *Bonus:* If you fill the 37 balloons on Bunch o Balloons plus one more ballon, how many balloons do you have?

*Big kids:* The dad who invented this thing has 8 kids. If he fills 37 balloons and hands them out as equally as he can to them, what’s the biggest number of balloons any kid can get? *Bonus:* If he wants every kid to have at least 10 balloons, how many batches of 37 does he need to fill?

Answers:*Wee ones: *Everyone’s sink will be different — but stop running the water early if you’re going to overflow!

*Little kids:* 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20! *Bonus:* 38 balloons.

*Big kids:* 5 balloons. The first 32 will go evenly, with 4 for each kid. Then a few kids will get a 5th balloon. *Bonus:* 3 batches. For the 8 kids to have 10 balloons each, he needs at least 80 balloons…and 2 batches, or 74 balloons, won’t be enough.