This is a great page to cut and paste the different phases of a frog's journey from egg to frog. We learned about the eggs, tadpoles, and froglets from the book "From Tadpole to Frog" by Wendy Pfeffer. We cut and pasted the different pictures that I found from the website http://www.archjrc.com/childsplace/bookthemes2.html.
Download the pictures from that website, or students can draw their own. If printed on A3 paper, those pictures will fit perfectly in the boxes. If not then have the students draw the pictures themselves.