Fly a Kite
It is surprisingly easy to make your own kite: all you need is paper, string, tape and cardboard. Here is a step-by-step tutorial: How To Make an Easy Kite. If you want to bypass the craft project, you can also buy a ready-made kite at Toys R Us. Whether homemade or store-bought, a kite can teach your kid about history (evidence of kites dates back more than 2,000 years to ancient China), geometry, art, aerodynamics, coordination, choreography, and the satisfaction of creating something and watching it soar.
Feed the Birds
It may seem like Bangkok is only home to pigeons, but there are nearly 400 different bird that can be spotted in the city. You can lure these beaked beauties right to your patio or balcony by hanging a bird feeder. You can make your own using anything from an empty milk carton to an orange peel, or even an old shoe. You can find some fun ideas here, and you can buy bird seed at most pet shops and the Gourmet Market in Terminal 21. Watching the birds eat, preen and interact is a fun little biology lesson, and if you want to take your ornithology to the next level buy A Field Guide to the Birds of Thailand (Book Depository offers free shipping to Thailand), so that when you and your child spot something new, you can document
Go on a Scavenger Hunt
There are some lovely parks in Bangkok, and going on a scavenger hunt is the perfect way to explore them. Structure the play session by giving your child a list of items to spot along the way. You can ask them to find different textures (something smooth, something rough, something fuzzy), or items starting with each letter of the alphabet (acorn, beetle, cat) or to try to find an object for each color in the rainbow. If you need more inspiration, there are lots of printable scavengers hunts like this one online.
Art in Nature
Set your child the task of finding as many different varieties of leaves as possible. When they have a nice little collection, give them paper and crayons. By placing a leaf under a piece of paper and using a crayon to go over the shape underneath, a colorful etching of the leaf is left behind. This is activity will help your child recognize the patterns and symmetry of nature. Even the unassuming leaf comes in dizzying varieties.