Wee ones: Are there more red or yellow slides in the picture?
Little kids: If the grandpa, the mom, the dad, and the 2 kids all ride the waterslide, how many people get to ride it? Bonus: If they start off connecting just 3 10-foot pieces, how long a slide do they make? Count up by 10s!
Big kids: If the grandpa, mom, and her son Oscar line up to take turns, how many different ways can they line up? Bonus: If a normal slide is 6 feet long, and this one has 18 10-foot sections, how many times as long as a normal slide is this crazy slide?
Wee ones: We count 2 yellow slides and 1 red slide, so more yellow slides!
Little kids: 5 people. Bonus: 30 feet: 10, 20, 30.
Big kids: 6 ways: GMO, GOM, MGO, MOG, OGM, OMG! (There are 3 choices for the 1st rider, then for each of those there are 2 choices for the 2nd, and the 3rd is set, giving us 3x2x1). Bonus: 30 times as long! 18 1-foot sections would be 3 times as long in total, so making them 10 feet multiplies that by 10.