One of Kabir’s friends gave him a kit, Slippery Slimes, for his birthday and this is what we enjoyed as part of our science experiment for the month of December. We made two kinds of slime and learnt two vocabulary words: polymer and colloid. We did a simple newspaper experiment where he understood why he can rip the newspaper straight when ripped vertical but it rips jagged when ripped horizontal. After making a colloid we understood what is a quick sand and what to do if we get stuck in it. It was interesting and enlightening to both of us. I wish we had done this when I was in school learning chemistry!
After studying about bones, Kabir did the puzzle showing all the bones on a human body.
Then we bought a drumstick to perform a rubbery chicken bone experiment. Kabir felt how hard and strong it was; then he put it in vinegar for 3 days to observe the effect of vinegar on bone. As we had read about ligaments, he saw and felt it on the drumstick. The bone didn’t become rubbery but it did become fragile and it snapped in two very easily. I didn’t lose the opportunity to tell him the importance of calcium for our bones.
Then Kabir made a model of his arm using paper towel rolls. We added balloons to represent the muscle and we observed how muscles work when we bend our arms.
Then we studied about skin and we performed a simple experiment to understand how skin cools the body. At first, I rubbed a cotton ball dipped in ice water on Kabir’s wrist and then I rubbed the cotton ball soaked in rubbing alcohol. Kabir felt more cool with ice water. Then I rubbed his wrist with cotton ball soaked in lukewarm tap water. He felt his skin cooler with the rubbing alcohol this time.
Then, we took another egg, put it in a tupperware with water. It took violent shaking to break the egg. So, the fluid protected the egg. Similarly, the fluid around our brain prevents it from breaking in our skull.
Last couple of weeks, we have been doing small experiments related to touch, sound and sight. We didn’t do any smell experiment as Kabir had done that at HealthWorks recently.
For Touch, we followed 2-Point Discrimination experiment. His subject was his grandmother. We bent the paper clip in the shape of ‘U’ and tried to figure out the distance between the receptors (feelers is what Kabir and I called) in the skin in different parts of the body.
He wrote down the distance between the receptors in different parts of the body as follows:
Foot – 1 1/2 cm
Hand – 1 1/2 cm
Back – 2 inches
Finger – 1/2 cm
Arm – 2 cm
Belly – 2 1/2 cm
Forehead – 2 cm
Knee – 2 1/2 cm
Tongue – 1 mm
For Sight, we followed “Are Two Eyes Better Than One?” experiment. Kabir was very surprised that it took him couple of tries before he could tap the erasers of the pencils together when he looked with one eye only.
It’s been so busy that I haven’t been able to even think of updating my blog. However, I’m back! Last week or may be 2 weeks ago, Amit and Kabir dissected owl pellet. I ordered the owl pellet from Amazon. They discovered that the owl pellet they dissected contained bones of a shrew. They really enjoyed this activity. There was no way I could have done this activity with Kabir as I thought the pellet stank. Thank God, Amit was home to do this activity with him. Kabir has saved all the bones in a ziploc bag and put it in his treasure box. I am not too thrilled about it but I have decided not to pick a fight with him about this.