diff --git a/kiddofun/quiz.rb b/kiddofun/quiz.rb
new file mode 100644
index 0000000..3310946
--- /dev/null
+++ b/kiddofun/quiz.rb
@@ -0,0 +1,38 @@
+def main
+  loop do
+    secret_number = rand(0..99)
+    hint_0 = secret_number - rand(0..49)
+
+    loop do
+      say "#{secret_number - hint_0} + #{hint_0} is", newline: false
+      print '?: '
+      begin
+        answer = Integer($stdin.readline.strip)
+        if answer == secret_number
+          say 'You got it!'
+          break
+        else
+          say 'That is so incorrect!'
+        end
+      rescue => e
+        $stderr.puts e
+        say 'NO, Human!'
+      end
+    end
+
+    say 'Do you want to play again? ', newline: false
+    print '[Y/n] '
+    if $stdin.readline.strip.downcase =~ /^n/
+      say 'Goodbye, Human!'
+      break
+    end
+  end
+end
+
+def say(msg, newline: true)
+  print msg
+  print "\n" if newline
+  system "say -v ralph #{msg.inspect}"
+end
+
+main
diff --git a/kiddofun/rounding.go b/kiddofun/rounding.go
new file mode 100644
index 0000000..0999528
--- /dev/null
+++ b/kiddofun/rounding.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	number := 43
+
+	fmt.Printf("%-2d - number\n", number)
+	fmt.Printf("%-2d - number tens place\n", number/10)
+	fmt.Printf("%-2d - number tens place multiplied by 10\n", (number/10)*10)
+}
diff --git a/kiddofun/rounding.rb b/kiddofun/rounding.rb
new file mode 100644
index 0000000..552032e
--- /dev/null
+++ b/kiddofun/rounding.rb
@@ -0,0 +1,9 @@
+number = Integer(ARGV.fetch(0))
+divisor = Float(ARGV.fetch(1, 10.0))
+
+raise 'Invalid divisor' unless divisor % 10 == 0
+
+puts "#{number} - number"
+puts "#{(Float(number) / divisor).round(0)}  - number divided by #{divisor}"
+puts "#{(Float(number) / divisor).round(0) * Integer(divisor)} - " \
+  "number divided by #{divisor}, multiplied by #{Integer(divisor)}"