Can you please check these sentences for me?

1)This afternoon my child went bobsleighing with his best friend. They had fun sleiding down the snow.
2)They tumbled (fell headlong) several times. They also went on a sort of plastic pan (with a long handle) whose name I don't know in English.
3)At the end of the day they were soaked
(wet through)but extremely happy.(Can you say: their clothes were dripping wet?)
4)Unfortunaltely, I had to buy my child 5) They also gave him a medal because he participated in a weekly ski course.
6) The ski pistes are all quite easy and this is why a lot of families with children spend their holidays here (come here on their skiing holidays?).
7) My son's primary school teacher has given him (can you use "has assigned"?) him a lot of homework. I believe we'll spend whole next week doing it.
8) On our way back to the hotel we stopped at a clothes shop (offering January sales) in the main street and I bought my son a sleeveless cardigan and a polo-neck shirt.
9)We were given (granted?) a 30% discount on each item.I bought them at a 30% discount. I got a 30% discount (reduction) on each of them???
(Can you say: "the shopkeeper knock off 30% for us"?)

1. sleiding = sledding

3. At the end of the day,... yes
4. I had to buy my child? or do you need to mention what you bought?
6. pistes = trails?
7. we'll spend the whole next week yes.
8. rather than "in" = on the main street
9. th shopkeeper knocked off...

Sra

In #4, what does that mean: "I had to buy my child." -- ??? Doesn't make sense to me.

Sure! Here are the revised sentences:

1) This afternoon, my child went bobsledding with his best friend. They had fun sliding down the snow.
2) They tumbled (fell headlong) several times. They also went on a kind of plastic sled (with a long handle) whose name I don't know in English.
3) At the end of the day, they were soaked (wet through) but extremely happy. (Yes, you can say "their clothes were dripping wet.")
4) Unfortunately, I had to buy my child new clothes.
5) They also gave him a medal because he participated in a weekly ski course.
6) The ski slopes are all quite easy, and that's why a lot of families with children come here for their skiing holidays.
7) My son's primary school teacher has assigned him a lot of homework. I believe we'll spend the whole next week doing it.
8) On our way back to the hotel, we stopped at a clothes shop that was having January sales on the main street, and I bought my son a sleeveless cardigan and a polo-neck shirt.
9) We were granted a 30% discount on each item. I bought them at a 30% discount. I got a 30% reduction on each of them. (Yes, you can say "the shopkeeper knocked off 30% for us.")