
So, your Duplo/lego stuff is pricey.
We bought a lot it mostly duplo.
Duplo
I built two trains, one went to a nephew.
Two ships
A helicopter
An aeroplane
A castle
I liked the ships, they had carpet stuck on the bottom so they could traverse the hardwood floor sea.
The bigger ship had a drop down bit at the back so you could drive your duplo vehicle in.
It had a sticky out bit like modern ships do, with a small boat hanging on by string, you could lower it, there was a magnet involved. It had had an anchor at the front, string and twisted insulated copper wire, anchor shaped. You could land the helicopter on the back deck at need. Part of the front deck could be lifted off to access the lower deck. You could add an official duplo block and then add lego to that. She sails no more. I've still got the castle, we never really used it that much.