Abstract: Toy aircraft, modular toy aircraft, modular power systems, and toy aircraft kits are disclosed. Toy aircraft may include a self-contained power and control system and an airframe. The self-contained power and control system may include at least one propulsion unit operable to propel the toy aircraft and a power and control unit. The power and control unit may include at least one energy source, be electrically connected to the at least one propulsion unit, and be configured to control operation of the at least one propulsion unit to control flight of the toy aircraft. The airframe may include a wing, a first mount configured to removably retain the at least one propulsion unit, and a second mount configured to removably retain the power and control unit.

Abstract: Toy vehicle sets may include a toy vehicle with an RFID transponder operable to produce an identification signal to identify the toy vehicle and an RFID reader configured to generate an electromagnetic field, detect an identification signal produced by an RFID transponder, and produce data representative of the identified toy vehicle. In some embodiments, the toy vehicle includes circuitry adapted to convert electromagnetic energy into power to operate the RFID transponder. In some embodiments, the toy vehicle includes a metal chassis with an aperture configured to support the RFID transponder and a transverse slot cut from an outer edge of the chassis to the aperture.