To add as another option besides black tea, if you are intestested, a lot of cafes sell "babycino" - it is the frothed milk that you would normally get on top of a cappucino and then LO's drink looks like mama's drink! Milk frothers can be found quite inexpensive in some places depending on how posh of one you want!
Here, fennel tea is popular for babies - though it does come powdered for babies rather than using the bags, but the powder mix is FILLED with sugar
. Both HIPP and Nestle make it and sell it in Europe - so you could try some fennel tea bags and see if your LO likes that. Apparently it smells lovely and is very calming. It says on the package that it is suitable from 8 months.
When I lived in Asia barley tea was quite normal for babies as well - adults often drink it as water also, just one bag in a large jug of water and let it sit at room temp so it gently seeps and flavours the water a bit. It can be bitter and takes some getting used to, though!
(PS I looooooooove rooibos! Its lovely - and it you take a bath in it, it's great for eczema!!!)