I know you are looking at the biometric models, but if you want to keep it simple I bought a Honeywell push button cash box that you can get a Wally World. I think they run about $30. Simple 4 button code with backup key and low battery light. 4AA batteries last about a year with daily use. No internal light, but I picked up one of the cheap "tap" lights and keep it in the drawer next to the safe.

It won't stop a thief, but keeps the kids safe.

It is $45 at Amazon: Amazon.com: Honeywell 3035D Digital Locking Steel Security Box: Home Improvement