What Makes a Foam Toy Truly High Quality

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Whether it’s puzzles or blocks, foam toys are a great choice to get for your children. Unlike those made from wood or plastic; they don’t cause injury, noise, or damage to flooring (or furniture) in the house.

But when buying a toy made from foam, you certainly shouldn’t just go for the cheaper stuff. Like all other things in life, you get what you pay for.

Instead, you should ensure the foam toy is actually great quality and will last longer for your children. But how exactly to do that?

The simple answer is ‘foam density’.

Foam Density of Toys

There are obviously some general considerations that determine the toy quality regardless of the type (e.g. customer reviews and material quality). For foam toys though, you should additionally watch out for foam density.

Foam density basically indicates how much foam was used in making the toy. The more foam used, the higher the toy quality (and sturdiness) will be.

The more foam used in manufacturing the toy, the higher its quality and sturdiness will generally be.

To find the foam density for a toy, simply divide the package weight over its volume.

In case you do your toy shopping on Amazon, you can find the item weight (and product dimensions) on the product listing. The package dimensions are used to calculate the volume.

Example on Using Foam Density for Toy Shopping

Below is an example that compares some toy building blocks including foam density.

Please note that Amazon items below have good customer reviews rating. And to get the package volume, we multiplied the dimensions then divided the total by 1728 to convert from cubic inches to cubic feet.

Package Weight (lb)Package Volume (ft3)Foam Density (lb/ft3)
Block set A0.790.342.32
Block set B1.740.384.58
Block set C1.320.274.89
Block set D2.290.405.72

You can see that set A has a much lower foam density than the others which probably makes the product of inferior quality.

The highest quality one is set D, which has a foam density that’s higher than all the rest.

In summary, here are your two options in this shopping scenario:

  1. If you want to save as much money as possible and don’t care much about the quality, go with set A.
  2. If you’re looking for the top quality regardless of the cost, grab set D.

Please note this process applies mostly to foam building blocks and puzzle playmats. For jigsaw puzzles, you should use the dimensions of assembled puzzle (rather than the whole package) in order to calculate the volume accurately. This is because the puzzle pieces are typically not snugged inside the package. Also, you should use the weight of the puzzle alone if the packaging type is not the same for all the products.


This is how to utilize foam density in order to gauge the quality of foam toys before you buy. It’s just a matter of performing some simple calculations based on the product data.

Of course, you will have more reliable data while shopping in-store as you can measure the weight and volume more accurately.

This article will hopefully help you out the next time you want to get a foam toy for your little ones.

Finally, we have created a foam density calculator that will effortlessly provide you with the foam density of any foam playmat, blocks or puzzle. You merely need to input the product weight and dimensions to get the result. Be sure to check it out.

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