Trampolines possess a large amount of physics in them. First of all, the springs all around the bottom share the same spring constant, showing how much energy a person can have when the spring expands and compresses. The constant in the spring decides how high you can jump. If your spring doesn't compress much then the bottom of the trampoline can't go as low and in turn, you won't be able to jump as high. Your want thick, sturdy springs for your trampoline, but also those that will be flexible and more fun to use. Everyone wants to jump high and experience physics when on a trampoline but some believe that how big you jump matters if your big or not, but it is also determined by your springs in the trampoline. That is why it is more fun to jump on a springy trampoline, especially when you are larger.