# From Bug Soup to Butterfly

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

# From Bug Soup to Butterfly

March 20, 2020

The start of spring is all about baby animals. So our fan Audrey C. asked, how does a caterpillar turn into a butterfly? Well, the change from caterpillar to butterfly is kind of gross, but also really amazing. First, the caterpillar eats nonstop, and grows really fast for about 2 weeks. The bug ends up weighing 200 times as much by the end of it! Then it attaches itself to a tree branch and sheds its skin, under which there’s a hard skin called a “chrysalis.” Over 2 more weeks, most of the caterpillar’s body turns into goop, and re-forms itself into a butterfly. Finally the butterfly crawls out and pops open its wings. After 4 weeks of sitting with nothing to do, that butterfly must be excited to fly.

Wee ones: Like all insects, a butterfly has 6 legs. Is that more or fewer legs than you have?

Little kids: If the caterpillar eats for 2 weeks, how many days is that?  Bonus: If that all starts on a Monday, what’s the 5th day the caterpillar pigs out?

Big kids: If you started eating nonstop today (March 20), what’s the date of your 14th day of eating? (Reminder if needed: March has 31 days.)  Bonus: What if you weighed 200 times as much after that as you do now? What would you weigh? (Hint if needed: Multiplying by 200 is the same as multiplying by 2, then by 100.)

The sky’s the limit: If the whole caterpillar “metamorphosis” (growth and chrysalis) takes exactly 4 weeks, and a caterpillar partway through that has 6 times as much time left as it’s already done, how many days of metamorphosis has the little guy done?