Waving cupcakes make kids smile and have blue teeth!

Wave cupcakes were on the menu for an event for girls club as our them has been Walk on Water.
I found a video that had 5 different shades of blue water, big sugar clams with pearls, graham cracker crumbs for beach - this is what I have. I realized my ability to make different blues wasn't happening and my time also wasn't going to work for 5 different blues. When I shopped for the supplies the store didn't have graham crackers and until that night in bed I forgot I was going to use some from home, totally forgot. You know what? These were great, the girls loved them, they knew what they were and enjoyed them all the same!  (Note: these are blue so my no blue food rule still applies, but kids LOVE blue food, why?  I have no idea.)

Vanilla Buttercream Frosting
1 1/2 cups butter, at room temperature (3 sticks)
4 1/2 cups powdered sugar
3 - 4 Tbsp heavy cream
1 1/2 tsp vanilla extract

In the bowl of an electric stand mixer, using the paddle or whisk attachment whip butter on medium-high speed (if using whisk attachment whip on high speed) until nearly white and very fluffy, about 7 - 8 minutes, frequently scraping down the sides of the bowl.
Add in powdered sugar, heavy cream, and vanilla extract and mix on low speed until blended, then increase speed to medium and beat until very light and fluffy, about 5 - 6 minutes, frequently scraping down the sides of the bowl.
Immediately spread over cooled cake or cupcakes.