Weird bits in toddlers urine

[Holidayyys]

Last few times my child has been on potty for a wee there has been these weird bits in the wee (see pic) she seems well and said nothing hurts when I asked. Any idea what they could be?

Did you ever find out what this was? My 4 year old is currently on antibiotics for suspected uti! Dip test showed nothing, lab showed a bit of blood! Other than frequent urination no other symptoms, however not improved since antibiotics and has these bits floating in urine

Did you ever find out what this was? 4 year old suspected uti dip test showed nothing lab found small trace of blood! Treated with antibiotics but still frequent weeing and now these bits in her urine

My daughter gets this- her consultant said urine crystals.