I found this SPRING PACK online. (You can download it for free if you register with the site.)
P.S. I AM HUGE ON USING WHAT OTHERS HAVE ALREADY CREATED!
I changed up the game "rules" a bit. I gave each boy a deck of cards since both of my guys LOVE to play cards. (Kings in the Corner, Solitare, Spit, Spoons, War, and variations of Rummy are their current favorites.)
Each boy took a turn flipping their card and trying to fill up their flower with EVEN or ODD numbers depending on what they pulled. The first one to complete their flowers, WINS.
You could easily make one of these flowers yourself as well.