What a generous offer, sharing the link for others as well who might need ideas. not sure but I just found these and think both of my boys would love to share these,. https://www.amazon.com/dp/B071KSFH5B/ref=cm_sw_r_cp_apa_89c2zbXCZGBX6

they love to build (and destroy) Check out the rest of the list: https://www.amazon.com/gp/registry/wishlist/3NW8GXTPWGQRH