Move the wood furniture to a well-ventilated area, and place a tarp underneath to protect the flooring below.
Sand the wood furniture lightly to remove any rough or bumpy spots. If the wood already has a coat of paint on it and you believe it may be lead-based paint, strip all the paint off; either by sanding or using a paint stripper liquid solution (purchased from your local hardware store).
Paint a coat of primer over the entire piece of furniture. This will give you an even base as a blank canvas to start your painting. Allow the primer to dry completely, approximately 6 to 8 hours.
Paint the entire piece of furniture in the color or design of your choice. Allow the paint to dry completely for approximately 6 to 8 hours.
Paint a coat of clear acrylic sealer over the entire piece of furniture. Allow the sealant to dry for at least 6 tp 8 hours.
Keep the furniture in a well-ventilated area for 2 to 3 days to allow any and all fumes to come off of the furniture. This will reduce the amount of toxins released into the child's room, and reduce the harsh chemical-based smell the paint and sealant can leave behind.
Move the furniture into your child's room.