Cut out big blue circles in cardstock or construction paper
Glue foil circles on top (for the pond).
Draw a picture of a frog (on green construction paper or color green)
Draw tadpoles (on brown paper or color brown)
For the frog eggs cut out bubble wrap shapes and put black dots in the centre of the bubbles with permanent marker (this doesn't rub off, so is ideal)
Stick each item in order around the pond.
If you'd prefer not to have the children draw all of the shapes themselves, use the templates from the Frog Life Cycle Craft from DLTK's Crafts for Kids.
Conclusion
Hang the work of your students on the classroom bulletin board.
Next Day Extension
Read the Very Hungry Caterpillar to the classroom. Using the white board, compare the life cycle of a frog to that of a caterpillar.