Instructables
Picture of Simple step stool for a child
This is a very simple step stool that can be used for a child (or an adult as well as it is very strong).
I made this step stool from one piece of 1" x 5" reclaimed lumber, and 12 wood screws.
You could use  a piece of 1" x 6", or 2" x 6" to make it a little taller.
(Click on the [i] at the top left of photos to see an enlarged version.)

Materials used
- One piece of 1" x 5" reclaimed cedar about 152 cm used (approx. 5')
- 12, 3 cm (1 1/4") wood screws

Tools used
- Table saw (a handheld circular saw, or a hand saw is also fine)
- Electric orbital sander (or sandpaper wrapped around a block of wood)
- Power drill
- Phillips screwdriver ("+" tip)
- Countersink drill bit

The attached Sketchup file shows the 3D assembled stool, and can be used to modify dimensions etc.
 
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Step 1: Cutting the wood

Picture of Cutting the wood
I cut the 1" x 5" into the following lengths:
- 2 x 40.5 cm (top pieces)
- 2 x 22.5 cm (legs)
- 1 x 26 cm (support - also cut it to 8 cm width)

After cutting I sanded the edges to remove any rough burrs.
I sanded the surfaces of the wood with about 180 grit as I did not want it too smooth (people will be using it with socked or bare feet).

Using your plan, I'm making 8 step stools for my grandchildren all under the age of 5. I used up my 3/4" MDF scraps, but not sure about how strong it is compared to wood. I cut 9x12 for the top. I cut 2 legs at 7x9. I cut 3x9.5 for the top brace. Because I wasn't sure about the strength of MDF, I cut 2 top braces for each stool. Now I'm not sure whether to place my braces together or spread them apart. I'm not sure which is better. Any suggestions? Once I'm done, I'll paint their names on them and give them for Christmas.

Alcyon11 months ago
The topplate shout have the same length as the stool.
Now you could flip the stool if you step on the edge.
I use it in this shape already many years to sit up when a i am reparing my car or motorcycle.
Trelligan2 years ago
   A very simple, necessary thing.

   Actually, I would estimate that this construction should hold well above 500 lb / 225 kg. Just make sure that everything ends up square. Using a bit of rubber as specified will help to prevent rocking if the floor surface is a bit less flat than the shelf itself.

   This is important, because someone using this might be putting something heavy on a high shelf.

   Making the middle support less wide than the legs is also an excellent idea, allowing you to use in in a doorway or someplace where you need to bridge over something on a floor.
canuckinjapan (author)  Trelligan2 years ago
Thanks. I made this for my kids, but if intended for mainly adult use, I would recommend making it a little wider.
Vince_332 years ago
Lovely - many thanks!