It's nowhere near Palm Sunday on Sunday, not Ash Wednesday till the 25th. So I think it is probably the camel and the eye of the needle. Can you not ask the teacher? I remember what trouble we had with our son, aged 5 who came home with "God said to Moses Godsivver". We worked out in the end that it was "God said to Moses: "Go thither". What a thing to teach 5-year olds eh?
I may be wrong but I think taht one of the city gates in Jerusalem was referred to as 'an eye of a needle' where it was so narrow, the camels had to squeeze through on their knees hence the saying about is it harder to get into heaven than a camel through the eye of a needle. If you want to browse through a Bible, St Mark's is the shortest gospel or googling should bring up the parables.
According to BibleGateway.com, you will find the story in three places:
Matthew 19:23-25 Mark 10:24-26 Luke 18:24-26
However, none of them mention mats - if we are on the right story, I reckon the mats are artistic license from children's Bible illustrators! So if the homework is to paraphrase it "from the New Testament", possibly she is looking for a different story after all
I'd be inclined to revert to "Dear Mrs Teacher, we don't know what story you are talking about, sorry about that ..."