At Brickies we have hundreds of these 32 x 32 LEGO baseplates. We find that children, in particular younger children, find it easier to build when they have large base area to start. These are great to build houses, a specific scene and could be a great homeschool resource. We are often asked where the best place to get them is and the truth is it varies as the RRP is £6.99 it is worth shopping around for offers.
At the time of writing this, Amazon have these on offer at £5.50 each. https://amzn.to/2Aev6zA