Five Little Ducks - Nice animation to use as teacher and students sing the song.

Butterfly Count - Click each plant to add a butterfly. Click a butterfly to make it go away again. Numbers 0-5

Flower Power - Chirp, Quack, and Peep need help sharing the flowers. Divide the flowers so that they each have the same number of flowers. Gets progressively harder.

 
Laughs and Giraffes - How many spots does the first giraffe have? Give the second giraffe one more or one less.