There is crochet pattern of tiny frog (you or your kid can take frog to the pocket or you can make it as keychain).
There is video of result

Level: beginner (U.S. crochet terminology)
You will need to know how to use a magic circle, single crochet and how to increase and decrease.

3'' (8 cm) - if you'll choose yarn and hook size as indicated in the pattern.

1. cotton yarn - thread (green, white and black),
2. crochet hook (you can use any yarn you like, only choose right hook),
3. needle,
4. scissors
5. fiberfill for stuffing