Thx they are very easy to do all you need to do is place a tack and place the minecart on it and break the track and put a slab or stairs next to it like the very next block and then place a non-sticky piston right next to the slab/stairs and before activating it place a block behind the minecraft and then turn the non-sticky piston on then turn it off then. BOOM! You got a chair with out a command or just look it up on youtube