I think he will be in the Meridian for longer than 12 months
.

I think, from memory, that 12kg is the "limit" for rear facing.

The Maxi Rider has a really high back and sides, so it is safe for tall kids and older kids......literally up to 26kg.......about 4 or 5?

Olivia is only just 13kg at nearly 4 (titch) so looks like she'll be in her Maxi Rider for another few years, LOL!

If he's bored looking backwards, then that's tough!
Mummy's singing not entertainment enough?!