This will be the start of many DIY threads I think, as after years of renting with shitty landlords we are buying a house and possibly due to complete at the end of the month 
The house has banisters that are painted on the bottom bit but the handrail is wood. As it's a brand new house it's untreated (and probably cheap wood too).
It's not high up on the priority list to change as we're starting from scratch, but what can I use to protect the wood and make it look a bit nicer for the time being? We have 3 children who aren't quite out of the grubby hands stage just yet. I don't think I want anything too shiny and happy to keep the wood light.
Thank you