Print the board pieces and three of each of the card pages. Cut them out and laminate them. Give each child a board. Put the cards in a stack. Have a child pick a card then identify the number and the color of the fish on the card. Have the child pick the appropriate number of corresponding colored
discs and stack them on the same colored fish on the board. Once the cards
are all gone, have the children count their discs to see which color
they have the most of.
If you are working with older children, print the graph page and Have them graph their results.
Here is a resource for the stackable discs.