These cards are best printed out on card stock and laminated for durability.
They can be used in many different ways. Some of my favorites include:
1) Memory/Matching Game: Have them flip over all the cards face down and match the cards. This can be done independently as the cards are made to self correct.
2) Puzzles: Leave them face up in a pile and have kids find the matches.
3) Partner Generator: Pass them out to each student (works best if you have an even number, but can be modified for an odd #) and to find their partner they have to walk around the room making the sound that their letter makes.
The cards are basic but it allows for a bounty of ideas and uses.