Light blood stains is not confirmatory of anything. It could be a tinge of some partially digested food article too. If otherwise child is fine, having no fever, is able to eat , and is active nothing to worry. Two times loose motions can happen in viral infections too. You can wait. It will settle
Next Steps
Keep a watch on danger signs
1. Consult pediatrician if there is blood mixed with stools or fresh blood
2. Child is running high grade fever
3. child is lethargic , has decreased urine , is unable to feed anything
4.