I don't know if that would solve your issue but you could do a first section with 37 randomized blocks, than you resting block and then another section with 38 randomized blocks.

I have a similar question.
I have 2 stories that I want to present to children in a randomized order but I want a resting block between the stories. So the stories can be randomized (Story A presented first and then Story B and vice versa) but there should be a resting block between the stories no better the order.
I couldn't find a solution so the best I could do is add in the block after the end of each story or play with the display logic but this a bit tedious as I have multiple conditions and cells.
If there is an easier way to do it?

betulz07 If it's only two, then you can do the following in the survey flow:

1. Randomizer with both story blocks. Show only 1


2. Break block


3. Story block A inside a branch with the condition: Question in A has not been displayed


4. Story block B inside a branch with the condition: Question in B has not been displayed

I'm trying to do something similar.
I've got 5 'experimental' blocks that I want to present in a random order but I also have an attention-check block that I want to always be presented 3rd.
Is there a way to randomise the 5 questions 'around' the fixed attention check?
I was thinking of having 2 randomisers, both containing all 5, and the first one only presents 2 and the second presents 3 but excludes whichever 2 were already presented - is there a way to do that?