These games are certainly worth playing. You will need a 3D-enabled card but the one in Acer Aspire One (yep, we have got one now :) ) is working fine.

I am really addicted :)

The plot of Neverball is simple, you are controlling a ball on the board by tilting the board. You collect the coins and get to the goal. It is completely 3D and you can control it with the keyboard, mouse or joystick. What makes it special is the set of boards, which range from simple playgrounds to completely insane multi-level buildings… Aw, you just need to see that :)

Neverputt is a golf game built on the same engine neverball is but you can play it with up to 4 human players (hot-seat, no networking though).

Get them from your local Ubuntu mirrors and check their oficial web-site.