I plan on doing advent of code this year. It's a fun holiday-themed activity to practice your coding skills.
I did it last year, but I only ended up completing through day 12. (You can see my solutions here).
I typically fail to complete the whole month because once you hit around day 15, the problems get hard enough that you need to set aside a good chunk of time to solve them (which I don`t have as a parent), but it's still fun to try.
I plan on using typescript since that's my bread and butter these days. If you want to follow along, you`ll find my solutions here. Also, if you want to compete/compare, my private leaderboard code is 2449401-3aef1910.
I`ll probably post some explanations/walkthroughs here on my site as well (as time allows).