@donsbot oops, I think my reply went astray below?!
Here's a bit of a thread with some resource links which may be of interest to you
@Mathforlove
Hi Dan, I mentioned your game #primeclimb today on here, a person was asking advice for their 6yo who appears to love maths ideas https://mastodon.nz/@meganisalanis/109409143756536155

@Axman6 hi - jeepers social media can be wonderful. I did a toot tagging the creator of #primeclimb and he has sent a range of links which may be of interest to you
@Mathforlove
Hi Dan, I mentioned your game #primeclimb today on here, a person was asking advice for their 6yo who appears to love maths ideas https://mastodon.nz/@meganisalanis/109409143756536155

@meganisalanis
I did write up these rules for #PrimeClimb with younger players! Could that help?
https://www.dropbox.com/s/anjk88uohedhce9/Prime%20Climb%20rules%20for%20younger%20players.pdf?dl=0

@Mathforlove
Hi Dan, I mentioned your game #primeclimb today on here, a person was asking advice for their 6yo who appears to love maths ideas

@Axman6 hi, I teach 9-11 year olds and love #maths myself.

Here are some fun and open challenges you could explore :
#OpenMiddle problems - website is packed with examples
#wodb site - open thinking, range of topics
#youcubed
#nrich
#wouldyourather #primeclimb is a great fun board game
#Mathssnacks videos and games
#sudoku
Best wishes, I hope your child stays keen 🤩