I sat and played with these things for an hour and they both work great. My older kids were laughing and thought it was pretty funny. The only thing I could not test was the missile on the helicopter because it is missing. The projectile for T-Rex is present and it works perfectly. T Rex is very large and very heavy. It is a very well made toy and it a lot of fun! You tell it to do things and it listens. It moves forwards, backwards, and it answers questions. It makes sounds and it lights up. The helicopter makes sounds and lights up also. Both are clean and in gently used condition. The battery compartment had some light corrosion on T rex but i cleaned it and he works great.