Fold a piece of green card stock in half and trace your child's left hand on it, with the pinky side on the fold line. Cut the handprint out, making sure to leave the entire left side of the handprint uncut. This will be the fold line for the card. 

Use the black marker to make spines all over the cactus handprint. 

Draw a half oval shape on the pink paper that's a little wider than your child's handprint to serve as the pot. Make a small sliver on the dark pink paper to serve as the water tray. Cut both out. 

Glue the water tray to the bottom of the plant pot, then glue the pot/tray piece to the bottom of the handprint cactus.

Open the card and write a sweet message to Mom!

Using the glue, attach the mini flower embellishments all over the handprint cactus.