Here’s a fun RC Mobile Spy Ear you can get your kids for Christmas. This thing allows you to hear things up to 50 feet away or even through walls.
Use this spy-mobile to infiltrate rooms up to 50′ away and listen to secret conversations with ear bud. Just pull back the car and it takes off. Parts snap together to store or clip onto your belt. Requires two 9V batteries, not included. Measures 8.5″W x 2.5″H x 3.5″D.