Hi prabha,
welcome to IL.Every mother with small kids face the same problem.Normally for playschools they take children from 2 years.since your kid is 18months,i don't think they will take him as he is too small.BUt you can make a try in KIdzee or eurokids.They teach only rhymes or games for very small children.As you are working,you can look for some creche.THere too they insist on 2 years.If you are planning to put him for more than 6 hours(in creches),they charge around 2000-2500Rs including food.in playschools fees range from 600 to 1500 Rs per month.Eurokids is very costly but it is very good.Kidzee is also very good.
If he gets admission, there is no doubt he will enjoy the most.So make a try.if you are lucky ,you can get admission in some good playschools.I know schools around Malleswaram,sadashiv nagar area.if you want i will give you the address.