Nertz is a fast paced card game.
You can buy a specialty deck on Amazon but really all you need are several visually different sets of standard playing cards.
Bananagrams is a fast paced word game that is great for all ages. It is played by as little as two and as many as eight, but the 3-4 range is ideal. It is very portable as well as pretty adorable. This game will fit in medium-sized purses or backpacks and is played anywhere there is a flat surface.
This game is no bank-buster, it runs on Amazon for around $15.
Do you have alternative rules for Bananagrams? Put them in the comments!