A trampoline apparatus with an attached safety net for use by young children of toddler age that provides them with the ability to stand on the apparatus and bounce up and down on their feet is herein disclosed. The projection lens includes, in order from the magnified end to the minified end thereof, a first lens of negative refraction power, a second lens of positive refraction power, a third lens of negative refraction power, a fourth lens of positive refraction power, and a fifth lens of positive refraction power. The parts feeder provides the fasteners to the fastener acceptor, which at least temporarily retains the fastener in a position for engagement with the drive member. The first and second engagement surfaces are adapted for positioning intermediate a valve and a receiving support of the sprinkler head. Accordingly, the solar panel support and the greenhouse shelf are integrated into a whole assembly by the modularized combination, and the place where the greenhouse situated can also be provided with a solar panel to receive the solar power to generate the electricity, which further fulfills the electricity requirement of the greenhouse or other devices. The recess is located between the abutted face and the assembling portion.