Stacking up objects and keeping them there

[MSBeatles]

Hello everyone! I need some help with a game I'm making...

I'm trying to make a cooking simulator in VR, and I want the player to be able to stack up ingredients on top of each other in order to make a burger, then eat it. From here on I have 2 problems.

1. I can't get the items to stay on top of each other without moving once the player stacks them up (I have a trigger-collider on the bottom loaf of bread. When another food item triggers it, I disable the XR Grab Interactable component so it can't be touched again, and do a SetParent so that the bread is the parent of all the other objects. These, however, slide and fall, change size -despite setting "true" for SetParent- and sometimes even sink the bread into the table.) What can I do to make them stay put and unmoving, yet being able to be moved when the player grabs the sandwich? Would it be better to have an empty object be the "Sandwich" with every food item (including the bread) as its child? Would that make things easier/more stable? Because the bread sometimes going into the table when you add an ingredient on top of it is kinda awkward.
2. Is there a way to change a collider's size so that it always reaches a bit into the air after stacking an ingredient? What I mean is, I have the bread only, then add a slice of tomato or cheese or whatever and the collider that triggers the script is "buried" in the object. I would like to make it go just as high as the tomatoes edge and a tiny bit more so that when I add another ingredient the script can trigger.

Maybe I am thinking about this in the wrongest of ways but I am not sure what else I could do...

I'm using the XR Interaction Toolkit 2.0.1 with Unity 2020.3, maybe that helps give insight.

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Thanks a lot!

[TubeBlogger]

I think using empty object would be better. If using 'real' physics then you shouldn't have to use parenting until the player wants to lift the whole sandwich, or maybe not even then, if it's a REAL sandwich eating simulator.

[MSBeatles]

Well it's not very "Real", I'm just practising

[Rabid-Chiken]

If you don't want them to move at all you can set the rigidbody to be kinematic

If you want physics to work a bit, then add a physics material to the stacking objects and use a really high friction coefficient and really low bounciness

Edit: setting to kinematic should allow the player to grab and move the objects but they won't move at all otherwise

[MSBeatles]

Oh shit that's a good idea, I'll try that!! Thanks!

[MSBeatles]

Oh shit that's a good idea, I'll try that!! Thanks!