Isaac has been experimenting with how to extend his bridges recently. He's been trying various supports for size. His wooden building blocks were too low and he couldn't get the track to line up. But Duplo seems to be the answer. Here he has built two piers from three blocks of Duplo each and has extended the link between two of his bridges.I think concentrating on the bridge led him to develop a less than satisfactory layout by his standards, as the circuit ends in a siding which the train has to reverse out of to complete its journey.
I don't know if you can see on the red suspension bridge, but there are blocks of Lego. Isaac wanted 'traffic lights', signals, for his trains. The other day at the station, a real one, he was asking about the red signal lights and wanting to know how they worked. As you can see he's got two trains on this track and the second one is waiting for the first to clear its section before proceeding.
This was definitely a day of trying things out..
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