Toy 2 - Fit It Cube Reflection

Unlike my first toy, I felt that this one was a bit complex. I think during the design process I was trying to make the toy as exciting as possible, and by doing so I think I ended up making the toy a bit strange. I think I would remove the water engagement, it feels awkward and forced in a sense. I feel like an audible timer, getting faster and faster as the timer goes on would create the stress and reaction desired from the user. In terms of actually building it, I assume a 3d printer or laser cutter would work, however I'm not sure how the internal structure would be created