Most items use LED bulbs. Many mood lamps offer color-changing LED effects and a timer-style auto-shutoff (commonly about 15 minutes). Simpler nightlights typically have a single on/off function with an integrated LED.
Age recommendations vary by product: some listings are labeled for 1 year and up, many are suggested for 3 years and up, and a few mood lights or toys are listed for 6 years and up. Check the product listing or packaging for the exact recommended age.
Most lights and toys are made from plastics—entries commonly list polypropylene or generic plastic for lights. Dolls and accessories are often plastic combined with polyester fabric.