The chair inserts are designed for toddler feed and play tables let the one below.
Step 1: Gather Materials
If you intend to make a leaf for you table, first make sure you table opens up wide enough. Our table came with leaves that are less than 9" wide. The seats themselves have an overall width of 14", so you will need at minimum 28" and more reasonably 30" to do this. Alternatively, you can add one seat to each side, in which case you will just need 15-16" (to leave some surface outside the seat).
The table we have isn't ours, so I couldn't cut it. I also had to add new extension slides as the table originally didn't open up to the 32" overall I used. This also wasn't a cheap way to go. The pair cost me $70, but I had already ordered the seats and the laminate sheet, so I was in it until the end.
The seats were bought online through a link in the original post. They come in a set of six, which means I have four seats I need to sell ($20 each, send me a message). I remember it breaks down to $16 a chair before shipping. Originally, they were super discounted, but when I got there, it cost me ~$100.
You will also need 3/4" plywood, some dowel pins to match you existing table, and some scrap wood to widen the table leaf to the correct thickness along the edges (and over the extension slides).
You will also need contact cement, wood glue, screws or staples, a drill, a jig saw and a circular saw/table saw. A self centering dowel jig is also a great idea.
If you are counting, material cost assuming you have to go all the way is ~$250 if you have to buy a set of six seats and don't buy mine instead. If you have a leaf to sacrifice, your table extends far enough and buy my extra seats, it drops to ~$50. The high chairs we were looking at were $110 each, so I will be over. But, when they start eating PRIMARILY solid food, I will be able to cut the leaf down to 16", and make an insert in the middle to hold supplies and have it double as an activity table too.
So yes, I still lost, but the grand vision was there. That grand vision was two less things to buy and trip over. It is definitely worth doing in some cases.
Step 2: Cut Plywood and Glue Laminate
I cut the plywood a few inches over the final size so I could trim it to final dimensions after the laminate was set. It my case, the table top not including the curve was 48", and the laminate 96". I trimmed it down before trying to glue it.
This is a video that really helped me :https://www.youtube.com/watch?v=qGr5GIhnebQ
Step 3: Add Endcaps and Support Rails
Finally, I added support rails that matched with thickness that lay perpendicular to the edges and sit on top of the extension slides.
Step 4: Shape Endcaps
The sample profile is exaggerated to show the basic setup.
Step 5: Drill Holes
Measure from the top and bottom to find out if your holes are centered or not. In my case they are not. I drilled to accept all five dowels, and drilled for three dowels on the corresponding pin side. If you get it right, the leaf will sit flush or nearly flush with the rest of your table.
Step 6: Measure and Cut Seat Locations
I traced out the lines with a square and checked my pencil lines several times. There is no point to rush this part.
The cuts were started with 1/4" drill bit and then cut with a jigsaw. You can put down tape to minimize chipout, but the seats have a lip anyway, and it is minor.
Step 7: Stain, Seal, Then Sand All Edges
After a could coats of polyurethane on the rounded edges, sand every sharp edge you can think of. I used a small plane then sandpaper of each edge I thought a foot, hand or anything else might ever touch.
Then, set it up and feed those babies!
SERIOUSLY, I do have four of the seats left. Send me a message before I think up some other project. Save me from myself!