first.. come into our mind is to buy a gate for our staircase.. we bought this LINDAM one.. and it have many many different sizes of extension.. so it basically can fixed to any size of the wall... so far we uses it and the quality is good.. easy to open and close for adult.. marcus also inspect on this everyday!!!
we also bought a few power socket cover.. so the little finger will not digging the holes.. haha
also bought the table cover cushion.. but it can only stick on top of the table and the bottom shape one it will drop easily due to gravity...
also bought 4 pcs of the drawer lock.. but haven't fixed it yet.. as it seem not yet very necessary!!