So, there's this cart. It's a good size, so the average Blocklander can push it. However, it is not just a vehicles that you push, you can also store a maximum of 15 items in it. To put the items in, you'd just do it like you were giving it to another fellow Blocklander, use Ctrl - W. Of course you can take them out. You do that by setting a control for it. Press the control, and if you are close enough to the cart, it opens a GUI. There is a drop-down-list and it says all of your items. Press the item, and it goes in your inventory. Do this for any other items you would like to take out.