Using these toys is super easy. First, for the crash and combine feature, take the Optimus Prime and Grimlock figures and follow the 6 - step process to build the 5 - inch Primelock. To transform the toys, convert Optimus Prime from truck to robot in 4 steps and Grimlock from T. rex to robot in 8 steps. You can also get other Crash Combiners (sold separately) and combine them for different battle setups. Remember, these toys have small parts, so keep them away from children under 3 years to avoid choking hazards. For maintenance, just keep them in a dry place and don't expose them to extreme temperatures. Have fun playing with your Transformers!