Remove the mattress from the crib. Verify the crib is in good condition and that it is capable of supporting the weight of an adult. Check your crib's instructions, if available, for the maximum weight it can hold. Verify there's no missing hardware or broken parts.
Remove the front side of the crib. Remove the screws with a screwdriver and the bolts with an Allen wrench. Verify there are no bolts or screws left in the sides of the crib. Store the front side of the crib. Leave the sides and the back of the crib intact.
Fasten down the bolts and screws on the rest of the crib tightly to prevent the crib from coming apart. Replace missing bolts and screws if needed.
Remove the finish of the crib with sand paper. Paint the bench in the color of your choice. Allow to dry. Place the mattress back on the crib to use as a cushion. Place other decorative cushions on the bench as decoration.