I bought these pots for a dollar a piece at Target back in the spring. (They were actually ice cream cups from the kitchen section). I love the brilliant colors and had really good intentions of buying some artificial succulents to put in them... until I saw the price tags. No way I was going to pay $7 per piece to fill my dollar pots. I ended up getting these $1 aquarium plants from the pet store and dropped them in.
Small inexpensive pots (I imagine you could paint some cheap clay pots at around $1 each) and aquarium plants. Easy-peasy!