Nature · For ages 7–11
How Spiders Make Webs for kids, explained simply
Spiders produce silk inside their bodies using special organs called silk glands. The silk comes out through tiny nozzles called spinnerets at the back of the spider’s abdomen. Different glands make different types of silk — some sticky, some strong — which the spider uses to build a web for catching food.
The big ideas
Silk comes from inside the spider
A spider doesn’t find its silk — it makes it. Special glands inside the body produce liquid silk proteins. As the spider pulls the liquid through its spinnerets, it hardens into a thread almost instantly.
Not all silk is the same
Most spiders have several kinds of silk gland, each making a different type of thread. Some silk is strong and dry for the frame; some is stretchy and sticky to trap insects. The spider moves on the dry threads so it doesn’t get stuck in its own web.
The web is an engineering feat
A spider builds its web in a careful order: first the outer frame, then the "spokes" radiating from the centre, then a spiral of sticky thread. The whole structure can catch insects while surviving wind — and it’s built in under an hour.
A quick quiz
1. Where does a spider’s silk come from?
Choices: It finds thread in the environment · It makes silk inside its own body · It collects plant fibres
Answer: It makes silk inside its own body. Silk is produced by glands inside the spider’s body and pushed out through tiny nozzles called spinnerets. The spider makes it from scratch.
2. Why doesn’t a spider get stuck in its own web?
Choices: It wears special gloves · It walks only on the dry, non-sticky threads · It has oily legs
Answer: It walks only on the dry, non-sticky threads. Spiders have different types of thread — some sticky, some not. They know which threads to walk on to avoid their own traps.
3. What do most spiders use their webs for?
Choices: To sleep in · To catch food · To show off to other spiders
Answer: To catch food. Webs are mainly hunting tools. When an insect flies into the sticky spiral threads, it’s trapped and the spider can move in.
For parents: helping your child think about how spiders make webs
Spider webs are one of the best natural examples of engineering your child will ever find, and the fact that the spider builds it with its own body is genuinely astonishing once you sit with it. The richest question to open with is "where do you think the thread comes from?" Most children guess it’s collected from plants or the environment — the reveal that it’s made inside the spider’s body is a real "wow." From there you can get wonderfully specific: different glands for different silks, sticky versus dry threads, the spider walking only on the dry ones. That last detail is a great thinking puzzle on its own: "If the web is supposed to catch things, how come the spider doesn’t get caught?" Let them reason it out. For the building sequence, look together at a real web if you can find one in the garden or a corner — identify the frame, the spokes, the sticky spiral. Having a name for each part makes observation feel like real science. Spider silk is famously stronger than steel by weight, which opens up a genuinely exciting conversation about materials and why engineers study it. The thinking skill here is "structure serves a purpose" — every part of the web has a job, and that pattern of purposeful design shows up everywhere from bridges to bones. Ask them to explain how the web is built, start to finish, in their own words.
Frequently asked questions
How do spiders produce silk?
Spiders have special organs called silk glands inside their bodies. These produce a liquid protein that hardens into silk thread as it passes through tiny nozzles called spinnerets at the back of the abdomen.
How long does it take a spider to build a web?
Many species can build a complete orb web in under an hour. Some spiders build a new one every night, eating the old silk and recycling the proteins.
Is spider silk really stronger than steel?
By weight, yes — spider silk is pound for pound stronger than steel and much more flexible. Scientists study it for potential uses in medicine and engineering.
A tutor that asks questions back
Whizbee is a safe AI tutor for ages 7–11 that turns curiosity into real understanding — finite missions, no open chat, and proof of thinking for parents. No scores, no streaks, no ads.
Join the Founder Year