About this 3D model

So i've been delaying making this gate for months now since my nephew ask for me to make him one.. i was busy and it didnt match any contest i know.. until the "Make some noise contest" from instructables.. so im making a muscial gate that play music and sound effects when it opens.. Instuctions on how to make them can be found here: https://www.instructables.com/Jurassic-World-Musical-Gate/