How to Build a Spaghetti and Marshmallow Tower (and Win the Science Prize)

Building a really tall spaghetti and marshmallow tower is trickier than you think - small tower: quick and fun, tall tower: labour of love!

The biggest problem is ‘slippage’, when the marshmallows on the lower layers slide down the spaghetti due to weight of the tower. So if you are planning to go huge, don’t build it on a hot day!

Spaghetti and marshamallow tower: tallest in the class
Tall and proud – our winning construction!

Above is the winning tower I helped my son to make, you’ll notice it has a small base in relation to it’s height - it was styled after the Eiffel tower!

How to make your own tall spaghetti tower

The instructions below show how we built our tower, they are followed by some additional ‘power-tips’, don’t forget to read them as well!

How to make a Spaghetti and Marshmallow Tower: illustrated guide

Power tips

1) If you’ll be taking your spaghetti and marshamallow tower to school, build it on a tray or piece of wood – the marshmallows tends to stick to surfaces, so don’t build on the table top and try and move it afterwards.

2) Build your tower in two parts. One of the biggest factors that limits the size of your tower is the size of your car. Unless your have a lorry it will be difficult to build a tower more than 4ft tall (don’t try lying it on its side). My solution was to build my tower in two parts, both around 3-4 ft tall.

3) Build your tower from lots of small pyramids, never cubes. The base of our tower consisted of 12 pyramids arranged in a 4 x 3 fashion, but to get some serious height you will need 5 x 4 or even 6 x 5 for the base.

4) It’s good to keep the structure light and strong, so don’t use too much spaghetti, but ‘doubling-up’ the spaghetti strands for the bottom two levels (two strands side by side) can add extra strength.

5) If the weight of the tower starts to cause slippage, build the top section as a narrower spire (as shown above).

5) Don’t try burning or cooking the marshmallows in order to ‘strengthen’ them. This doesn’t work. It’s best to use fresh marshmallow straight from the packet as they are very sticky and grip the spaghetti really well. Also, push the spaghetti deep into the marshmallow, rather than halfway-in, this helps create a more sturdy construction.

Not just for school!

Building a spaghetti and marshmallow tower doesn’t have to be the preserve of school science projects, it also makes a great kids’ activity for rainy days and summer holidays!

Left illustration
Right illustration