The LEGO Dino Defense HQ 5887 is a building set that features a T-Rex and a headquarters for the Dino Defense team. It is part of the LEGO Dino theme and the Jurassic Park subtheme. The set includes the Dino Defense HQ building, a helicopter, a T-Rex, and several minifigures. The set is designed for children aged 6-12 who are interested in animals and dinosaurs. The box has factory seals in place and is in excellent condition.