Lego Winter Holiday Train 10254

I bought this Lego set for Christmas, to put it under the Christmas tree and let it go round and round. As its reputation stands, the build quality is good, there're much attention to details with the little pieces putting together, nicely decorated. This train set has 734 pieces, you can get the power function to get it moving. The power function is build up from 8879 (IR speed remote control) + 8884 (IR receiver) + 88000 (AAA battery box) + 88002 (Train motor).

I just need it running on a constant speed on the track, hence, didn't buy the Remote control and IR receiver. With the batteries and train motor only, it will run too fast and derail (The batteries box requires 6 AAA batteries, which give you 9V in total). I replace 4 of the batteries with dummy batteries (DIY), which makes it only running on 2 real batteries, giving a total of 3V. It runs slows enough to watch it comfortably going round and round under the tree.

I DIY the dummy battery by using magnetic balls, lining them up to the length of the battery, then wrap them up with paper. The photos below shows the magnetic balls I used to build the dummy battery.