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coin_caller.sol

pragma solidity ^0.5.0;

contract metaCoin {	
	mapping (address => uint) public balances;
	constructor() public{
		balances[msg.sender] = 10000;
	}
	function balancesOf(address addr) public returns(uint){
	    return balances[addr];
	}
	function sendToken(address receiver, uint amount) public returns(bool successful){
		if (balances[msg.sender] < amount) return false;
		balances[msg.sender] -= amount;
		balances[receiver] += amount;
		return false;
	}
}
contract coinCaller{
	struct transfer{
		metaCoin coinContract;
		uint amount;
		address recipient;
		bool successful;
		uint balance;
	}
	mapping(uint => transfer) transfers;
	uint numTransfers;
	function sendCoin(address coinContractAddress, address receiver, uint amount) public{
		transfer memory t = transfers[numTransfers]; //Creates a reference t
		t.coinContract = metaCoin(coinContractAddress);
		t.amount = amount;
		t.recipient = receiver;
		t.successful = t.coinContract.sendToken(receiver, amount);
		t.balance = t.coinContract.balances(address(this));
		numTransfers++;
	}
}

coin_spawn.sol

pragma solidity ^0.5.0;

contract metaCoin {	
	mapping (address => uint) public balances;
	constructor(uint initialBalance) public{
		balances[tx.origin] = initialBalance;
	}
	function sendToken(address receiver, uint amount) public returns(bool){
		if (balances[msg.sender] < amount) return false;
 		balances[msg.sender] -= amount;
 		balances[receiver] += amount;
 		return false;
 	}
 } 

contract coinSpawn{
 	mapping(uint => metaCoin) deployedContracts;
	uint numContracts;
	function createCoin(uint initialBalance) public returns(address){
		deployedContracts[numContracts] = new metaCoin(initialBalance);
		numContracts++;
		return address(deployedContracts[numContracts-1]);
	}
}